Verifying a Testing Laboratory and Its Accreditation
Verify the laboratory's identity and the scope of the activity behind the result. An accreditation certificate confirms a defined recognition; you still need to check the organisation, testing location, material or matrix, method and any relevant limits. A laboratory name or accreditation logo on its own cannot establish that a particular test is within scope.
Identify the organisation that performed the test
Take the laboratory name and address from the complete report. Distinguish the document issuer from any subcontracted test performer. A trading name, group headquarters and testing site may differ, so record the relationship instead of assuming that one listing covers them all.
For UKAS accreditation, start with the official accredited organisation search. Search using the organisation or accreditation number from the report, then compare the listing and schedule with those details. If you cannot find a match, seek clarification from the laboratory or accreditation body. A failed name search alone does not prove that a report is false. [A5]
Check what the accreditation covers
ISO/IEC 17025 provides requirements for testing and calibration laboratory competence, impartiality and consistent operation. Accreditation bodies use it when assessing laboratories. [A2] ISO 9001 certification addresses a quality management system and does not replace that technical competence assessment. [A3]
Read the schedule attached to the accreditation, including location codes and limits. Use this record sheet to keep your comparison specific.
| Field | What to record from the evidence | Question to resolve |
|---|---|---|
| Organisation and site | Name, accreditation number and testing address | Does the listing cover the site that performed this analysis? |
| Material or matrix | The material category named in scope | Does it cover the submitted sample type? |
| Activity and method | Test, technique and method identifier or permitted method family | Does it cover the reported measurement? |
| Limits or conditions | Relevant range, exclusions and qualifications | Does the result fall within the stated coverage? |
| Status and date | Schedule version, listing status and date checked | What evidence establishes coverage when the test took place? |
Do not extend an HPLC scope to a different technique or measurement without checking it. The site's analytical testing methods page distinguishes common methods; it does not establish a laboratory's accreditation for them.
Treat flexible scope as a bounded permission
Some laboratories hold flexible scopes. UKAS explains that these can permit new or modified activities within defined boundaries even when the schedule does not list each activity by name. They do not permit unrestricted claims of accreditation. [A4]
If the exact method is absent, first check whether the schedule grants relevant flexibility. Ask the laboratory for the controlled activity record or written explanation that connects the reported method to those boundaries and the test date. Until that connection is clear, record coverage as unresolved.
A fictional scope comparison
Suppose a report describes HPLC analysis of a peptide powder at Site B. The schedule you have covers a specified water test at Site A. The common word “testing” does not connect those activities.
| Evidence you hold | Conclusion you can record |
|---|---|
| A certificate naming the laboratory, without its schedule | Laboratory identity may be established; coverage of this test remains unresolved |
| A schedule limited to the water activity at Site A | That schedule does not demonstrate coverage of the stated peptide analysis at Site B |
| A relevant fixed-scope entry, or a supported flexible-scope connection, for the reported site and activity | Scope correspondence is supported, subject to status and date checks |
This is an invented comparison, not an assessment of any named laboratory. It illustrates a documentation decision, not a judgement about the quality of an unexamined result.
Check the report date as well as today's status
A current directory entry answers a current-status question. For an older report, ask for evidence of the scope and status applicable when the laboratory performed the work. Where a suspension, withdrawal or scope change may matter, ask the accreditation body or laboratory to clarify the affected activities and dates.
Check whether the report distinguishes accredited work from other results or subcontracted work. If another laboratory performed a test, trace that test to the relevant organisation and scope. Keep the dated evidence with your review instead of retaining only a screenshot of a logo.
Keep accreditation within the wider evidence check
Accreditation does not connect a report to your container or establish every quality attribute. Compare the issuer and sample relationship using manufacturer certificates and independent reports. Check sterility, endotoxin and bioburden as separate endpoints when those attributes matter.
Record your outcome as scope correspondence supported, unresolved, or not demonstrated by the supplied scope, with the reason and date. Use the quality documentation overview or supplier qualification route for outstanding records. Do not turn a partial check into a blanket statement that a product or supplier is accredited.
References
References support document-reading and analytical principles. They do not establish supplier compliance, an appointed laboratory or a result for any lot.
- [A2] ISO/IEC 17025:2017: General requirements for the competence of testing and calibration laboratories. 2017; public page confirms review in 2023. Public overview and accreditation FAQ.
- [A3] UKAS: Accredited vs non-accredited laboratories. 16 January 2024. Accreditation or certification?.
- [A4] UKAS GEN 4: Policy and guidance on flexible scopes. Edition 2, November 2024. Section 3.1–3.3, printed page 4.
- [A5] UKAS: Search accredited organisations. Current directory route. Official directory.
Sources accessed 23 October 2026. The ISO source is its public overview, not the full paid standard. Relevant UKAS passages and directory details were available through search indexing; direct page/PDF access was unavailable during preparation. No supplier accreditation was verified.